Rigol DS1000Z-E Series User Manual page 150

Chapter 7 Protocol Decoding
Start Bit: represent when the data starts outputting.
Data Bits: represent the number of data bits actually contained in each frame of
data.
Check Bit: used to check the correctness of the data transmission.



Stop Bit: represent when the data stops outputting.
Press MATH Decode1  Decoder to select "RS232" to open the RS232
decoding function menu.
1. Press Decode to turn on or off the decoding function.
2. TX and RX Channel Setting
3. Baud Rate Setting
4. Copy Trigger
5. Polarity Setting
6. Order Setting
7. Data Line Setting
DS1000Z-E User Guide
Find Quality Products Online at:
Odd Checkout: the total number of "1" in the data bit and check bit is an odd.
For example, when 0x55 (01010101) is sent, a 1 needs to be filled in the check
bit to make the number of 1 be an odd.
Even Checkout: the total number of "1" in the data bit and check bit is an even.
For example, when 0x55 (01010101) is sent, a 0 should be filled in the check bit.
None: there would not be check bit during the transmission.
Press Tx to select any channel (CH1 or CH2) as the transmitting channel and
when "OFF" is selected, no transmitting channel is set. Use the same method
the set the Rx channel.
Press Baud and use
20000000. You can also press Preset to select 2400, 4800, 9600, 19200, 38400,
57600, 115200, 230400, 460800, 9216000, 1M, 2M, 5M, 10M and 20M. The
default is 9600 and the unit is bps.
Press CopyTrig to copy the protocol trigger settings from the trigger system
and set the corresponding decoding parameters automatically. During RS232
decoding, this function is valid only when the trigger type is RS232 trigger. You
can copy the settings of data channel, width, baud rate, stop bit, check mode
and polarity.
Press Polarity to select "
default is .
Press Order to select "LSB" or "MSB" and the default is "LSB".
As mentioned before, in RS232, you need to set the start bit, data bits, check bit
(optional) and stop bit of each frame of data. "Start Bit" is specified by the
GlobalTestSupply
www.
to set the desired baud rate. The range is from 110 to
(positive)" or "
RIGOL
(negative)" and the
7-7
.com
sales@GlobalTestSupply.com